Question 1

What is the difference between OpenAI o3 and Claude Opus 4?

Accepted Answer

OpenAI o3 is developed by OpenAI while Claude Opus 4 is developed by Anthropic. in 42 community votes on RIVAL, Claude Opus 4 wins 72% of head-to-head matchups. These results are based on blind head-to-head voting across 33 challenges.

Question 2

Which is better, OpenAI o3 or Claude Opus 4?

Accepted Answer

Based on 42 community votes on RIVAL, Claude Opus 4 wins 72% of head-to-head matchups against OpenAI o3. Claude Opus 4 is strongest in Web Design, Image Generation. However, OpenAI o3 leads in Reasoning.

Question 3

How much does OpenAI o3 cost compared to Claude Opus 4?

Accepted Answer

OpenAI o3 costs $10/M input tokens and Claude Opus 4 costs $15/M input tokens. OpenAI o3 is $5.00/M cheaper per input. The more expensive model wins 72% of duels, so the premium may be justified by quality.

Question 4

How are OpenAI o3 vs Claude Opus 4 votes collected on RIVAL?

Accepted Answer

RIVAL presents both models' outputs side-by-side in blind duels — voters see the responses but don't know which model produced each one. This eliminates brand bias. 42 votes have been collected for this pair across 33 challenges. All vote data is part of RIVAL's open dataset.